SAFETY SCAFFOLD
A construction safety device includes a wall bracket and a platform bracket. The wall bracket includes an interior member, a wall top member and an exterior member which are integrally formed. The wall bracket is placed over the wall. The platform support bracket is removably fixed to the wall bracket. A plurality of the construction safety devices is attached to the wall of a structure to form a construction safety system. A barrier and a platform are positioned over the construction safety devices.
The present inventions relate to building equipment or construction equipment, for example, safety equipment for roofing and building scaffolding
BACKGROUNDU.S. Pat. No. 4,852,692, titled ROOFING SAFETY DEVICE, describes a roofing safety device, adapted to be used in connection with substantially all roof configurations comprising an upright support, adapted to be secured to the roof of a building, having at least one self-braking mechanism and cable assembly attached thereto. Disposed at the free end of the cable is a fastening device which may be secured to one of a plurality of heavy rings secured to a belt. The plurality of rings provided on the belt enables the worker to attach the cable of the self-braking mechanism to either side of his body, thereby allowing the worker to perform his task on the roof without being chafed by the cable. A pair of stabilizing struts, each having a rectangular foot at the distal ends thereof which are rotatable about a pair of orthogonal axes enables the device to conform to substantially any rooftop configuration. The ability of the safety device to be used in connection with virtually all rooftops, combined with the non-irritating manner in which the device may be secured to the worker increases the likelihood that the device will be used habitually, so as to reduce the number of roofing injuries and deaths.
U.S. Pat. No. 5,503,358, titled SUSPENDED WALL SCAFFOLD STRUCTURE, describes a scaffold structure which may be suspended from the top of a wall to support wooden planks or the like in an elevated, horizontal position. The structure includes a main support member having a hanging bracket for engaging the top of the wall to support the main support member vertically along the wall. A platform member orthogonally projects from the main support member and receives the planks thereon. A brace member is connected to and extends between the main support member and the platform member to rigidify the structure of the invention. The structure may be compactly folded for transportation and storage, and an extension member is provided to facilitate positioning of the scaffolding atop second story or higher walls.
U.S. Pat. No. 5,829,549, titled WALKWAY WITH RAIL SYSTEM, describes a walkway system for roof, truss or elevated workers or the like attached to a structure, e.g. a building wall r1 an unfinished building. The system utilizes first and second longitudinally spaced-apart support assemblies for releasable attachment to a top of a building wall. Each assembly presents a depending support bar extending along an exterior surface of a building wall. A horizontal support brace is attached to each depending support bar at selectable positions therealong, the horizontal support brace providing support for overlying boards of a walkway. Attached to the free end of the horizontal support brace is a vertical post having a plurality of vertically spaced-apart brackets thereon for receiving a portion of a plurality of vertically spaced apart hand rails therein. A series of hook-like brackets are releasably placed along the rails for positioning a reinforcing strut adjacent each hand rail. The walkway can be vertically offset from the top of the building wall as well as laterally extended therefrom. The walkway with reinforced hand rails is effective in presenting a barrier to preclude workers from falling onto the ground.
U.S. Pat. No. 6,666,298, titled HANGING SCAFFOLD SUPPORT, describes a scaffolding support designed to hang from the top of a wall and further designed to allow a complete roof including a frieze block to be installed without removing the hanging scaffolding support. The hanging scaffolding support is further designed to be removable with a frieze block installed. The hanging scaffolding support includes a wall securing assembly, a vertical support, a horizontal support, and a vertical safety rail support.
U.S. Pat. No. 6,886,662, titled HANGING SCAFFOLD SUPPORT, describes A scaffold support system having an adjustable-width hanger. A vertical leg may support a foot upon which rests a deck, providing a working surface during building construction or modification. A lateral beam rests on a support structure forming part of the wall of a building with the vertical leg securing to the lateral beam at a plurality of points. A stop secured to the lateral beam to capture a support structure between itself and the vertical leg. The stop may be adjustable along the lateral beam to accommodate support structures of varying widths. An operator may insert the hanger from inside a building and pass the coupler through a gap between a frieze block and a top plate, presenting the coupler for securement to the vertical leg. A catch may slide along the foot into and out of engagement with an edge of the deck to prevent rotation of the deck.
All Figures are illustrated for ease of explanation of the basic teachings of various embodiments of the present invention only; the extensions of the Figures with respect to number, position, relationship and dimensions of the parts to form the preferred embodiment(s) will be explained or will be within the skill of the art after the following description has been read and understood. Further, the exact dimensions and dimensional proportions to conform to specific force, weight, strength, and similar requirements for various applications will likewise be within the skill of the art after the following description has been read and understood.
Where used in various Figures of the drawings, the same numerals designate the same or similar parts. Furthermore, when the terms “top,” “bottom,” “right,” “left,” “front,” “rear,” “first,” “second,” “inside,” “outside,” and similar terms are used, the terms should be understood to reference only the structure shown in the drawings and utilized only to facilitate describing the illustrated embodiments. The terms should be understood to reference the structures shown in the drawings as they will typically be utilized by user, e.g., construction worker or roofer, of the apparatus and systems shown and described herein in accordance with embodiments of the present invention.
DETAILED DESCRIPTIONThe Figures generally illustrate exemplary embodiments of a construction safety device and system, for example, a roofing safety system. Examples of the present disclosure can be used in the construction trades for residence construction, retail construction, or commercial construction. Also illustrated are methods for implementing aspects of the construction safety system. These illustrated embodiments are not meant to limit the scope of coverage but, instead, to assist in understanding the context of the language used in this specification and in the appended claims. Accordingly, the appended claims may encompass variations of described systems and methods for using the system that differ from the illustrated embodiments.
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The stanchion 450 includes a fastening system 452. The fastening system 452 is adapted to attach a portion of a barrier 520. In one embodiment of the fastening system 452, the stanchion 450 includes at least one hook 454 adapted to hold a portion of a barrier 450. In some embodiments, the stanchion includes a plurality of hooks 454 or other fasteners for holding a portion of a barrier. As shown in
The platform wall bracket 400 includes at least one keyhole 440 designed to receive the key 340 from the wall bracket 300 and removeably fix the wall bracket 300 to the platform support bracket 400.
The platform support bracket 400 is attached to the exterior member 330 along the vertical bar 430 of the platform support bracket 400. The contact surface 336 abuts the contact surface 436 of the vertical bar 430. The horizontal bar 410 supports the platform 510 such that a person can safely stand on the platform. In addition, the platform may also support several squares of shingles while supporting a user so that the user can easily move shingles from a square to a selected position on the roof during roofing operations. Other building materials can also be supported on the platform 510. The stanchion 520 includes a fastening system for fastening a barrier or obstacle.
The wall bracket 300 and the platform support bracket 400 generally are removably fixed with respect to one another. At least one of the first or second exterior member 330 of the wall bracket 300 includes a key 340 extending outwardly from the exterior wall. The corresponding first or second platform support bracket 400, 400′ includes a keyhole 440, 440′to receive the key 340, 340′ and removeably fix the at least one of the first or second wall bracket 300, 300′ to the at least one of the first or second platform support bracket 400, 400′. In one embodiment, the keyhole includes an inclined surface 840 that serves to wedge the key 340 into the keyhole 440 as it further engages the keyhole. In one embodiment, the wall bracket 300 and the platform support bracket 400 are fixed or secured to one another so that the wall bracket 300 and platform support bracket 400 are removed from the wall as one piece. The platform support bracket 400 is later removed from the wall bracket 300 using a hammer or sledge hammer if the brackets 300 and 400 are held together with a wedge press fit between the key and keyhole. The first wall bracket 300 and the second wall bracket 300′ include nail openings for tying the first wall bracket 300 and the second wall bracket 300′ to the exterior wall. Any nails used to tie the first and second wall brackets 300, 300′ to the wall must be removed to remove the wall bracket and platform support brackets.
In use, the scaffolding system can be used as follows. The wall framers can install the wall bracket when framing the wall. The wall bracket extends over the top of the wall and will have an exterior member along the outside of the wall. The platform bracket is then fixed to the wall bracket. The worker can then reach the roof and complete roof framing, sheathing, addition of roof paper, and roofing materials. Construction workers can also install the fascia from the platform. Depending on the interior design of the building, the wall bracket can be left in place until the drywall or interior finish is needed. In some designs, the wall brace can be removed and the platform can remain in place when interior finish work is completed. In an example, the brick layers or siding installers can remove the scaffold system, i.e., platform bracket and wall bracket, as they bring their scaffold up to finish the exterior of the building. The system, e.g., the wall bracket, will be removed prior to installation of the soffit.
The devices and systems described herein can be used by construction workers with little training and does not require the workers to provide additional components. In some prior roofing safety devices, require the installation of pivots of stringers at the roof peak. These systems attach the workers by lines, which can become entangled. Moreover, some work on the roof must be done prior to installation of such devices. The presently described device can be installed prior to any work on the roof That is, once the walls are raised the construction safety system 200 of the present application can be installed. In an example, the wall can be constructed and the wall bracket 300 installed prior to raising the wall. After the wall is raised, the platform support bracket 400 can be attached to the wall bracket 300. In other examples, the entire system 200 can be assembled prior to raising the wall. Other prior are platforms focus the load of the platform at a lower end of the platform. The platform can further require a stringer onto which the platform is affixed. Embodiments of the present invention do not require stringer. Compliance and use will increase by not using a stringer. Safety is believed to be increased as at various construction sites a stringer of sufficient length may not be available. Sufficient length may be defined as the entire length of the scaffold. Workers may then use scrap, which may not be safe. The present system does not use pins or removable bolts to construct either the wall bracket or the platform bracket. This reduces the possible failure points of the present system.
Although a few variations have been described and illustrated in detail above, it should be understood that other modifications are possible. In addition it should be understood that the logic flow depicted in the accompanying figures and described herein do not require the particular order shown, or sequential order, to achieve desirable results. Other embodiments may be within the scope of the following claims.
The foregoing discussion discloses and describes merely exemplary embodiments of the present inventions. Upon review of the specification, one skilled in the art will readily recognize from such discussion, and from the accompanying figures and claims, that various changes, modifications and variations can be made therein without departing from the spirit and scope of the invention as defined in the following claims.
Claims
1. A construction safety device, comprising:
- a wall bracket, including a interior member, a wall top member and an exterior member, which are integrally formed, the exterior member extending downwardly from the wall top member flat against an exterior wall of a building;
- a platform support bracket connected to the wall bracket, the platform support bracket defining a platform to support a person and a rear obstacle, the platform support bracket including: a substantially vertical bar to be positioned adjacent the exterior member, a substantially horizontal bar with a first end fixed to a top of the vertical bar and a second end, a brace extending from the substantially vertical bar to the substantially horizontal bar to support the substantially horizontal bar outwardly from the substantially vertical bar, a stanchion extending upwardly from the second end of the horizontal bar.
2. The construction safety device of claim 1, wherein the exterior member of the wall bracket includes a key extending outwardly from the exterior wall, and the platform wall bracket includes a keyhole to receive the key and removeably fix the wall bracket to the platform support bracket.
3. The construction safety device of claim 2, wherein the keyhole within the platform wall bracket includes an inclined wedge surface for wedging the key into the platform support bracket as the key enters the keyhole.
4. The construction safety device of claim 1, wherein the stanchion includes a fastening system adapted to attach a portion of a barrier to the stanchion.
5. The construction safety device of claim 4, wherein the stanchion includes at least one hook adapted to hold a portion of a barrier.
6. The construction safety device of claim 1, wherein the wall bracket includes a motion limiting device.
7. The construction safety device of claim 7, wherein the interior member of the wall bracket includes a fastener aperture therein.
8. The construction safety device of claim 7, wherein the exterior member of the wall bracket includes a nail opening therein.
9. The construction safety device of claim 7, wherein the interior member includes a nail opening therein, and the exterior member of the wall bracket includes a nail opening therein.
10. A construction safety system, comprising:
- a first wall bracket, including a first interior member, a first wall top member and a first exterior member, which are integrally formed, the first exterior member extending downwardly from the first wall top member flat against an exterior wall of a building;
- a first platform support bracket connected to the first wall bracket, the first platform support bracket defining a platform to support a person and a rear obstacle, the first platform support bracket including: a first substantially vertical bar to be positioned adjacent the exterior member, a first substantially horizontal bar with a 1st end fixed to a top of the first vertical bar and a second end, a first brace extending from the substantially vertical bar to the first substantially horizontal bar to support the substantially horizontal bar outwardly from the first substantially vertical bar, and a first stanchion extending upwardly from the second end of the first substantially horizontal bar;
- a second wall bracket, including a second interior member, a second wall top member and a second exterior member, which are integrally formed, the second exterior member extending downwardly from the second wall top member flat against an exterior wall of a building;
- a second platform support bracket connected to the second wall bracket, the second platform support bracket defining a platform to support a person and a rear obstacle, the second platform support bracket including: a second substantially vertical bar to be positioned adjacent the exterior member, a second substantially horizontal bar with a 1st end fixed to a top of the second vertical bar and a second end, a second brace extending from the substantially vertical bar to the second substantially horizontal bar to support the substantially horizontal bar outwardly from the second substantially vertical bar, and a second stanchion extending upwardly from the second end of the second substantially horizontal bar;
- a platform extending between the first platform support bracket, and the second platform support bracket; and
- a barrier extending between the first stanchion and the second stanchion.
11. The construction safety system of claim 10, wherein the platform has a width and length to prevent users from falls past the platform.
12. The construction safety system of claim 11, wherein the barrier has a width and length to prevent users from falling past the barrier.
13. The construction safety system of claim 12, wherein the first stanchion and the second stanchion each include a fastening system to attach the barrier to the first stanchion and the second stanchion.
14. The construction safety system of claim 12, wherein the barrier includes a mesh.
15. The construction safety system of claim 10, wherein at least one of the first exterior member or second exterior member include a key extending outwardly from the exterior wall, and wherein at least one of the first platform wall bracket or second platform support bracket includes a keyhole to receive the key and removeably fix the at least one of the first or second wall bracket to the at least one of the first or second platform support bracket.
16. The construction safety system of claim 15, wherein at least one of the keyholes includes an inclined wedge surface to wedge the key into the platform support bracket as the key enters the keyhole.
17. The construction safety system of claim 10, wherein the first wall bracket and the second wall bracket each include a fastener aperture to tie the first wall bracket and the second wall bracket to the exterior wall.
18. The construction safety system of claim 17, wherein at least one of the first wall bracket and the second wall bracket include a wall brace connected to the interior member to assist in holding a wall in a vertical position.
19. The construction safety system of claim 17, wherein the wall brace include a head positioned between the interior member and a top plate of the wall.
Type: Application
Filed: Mar 22, 2012
Publication Date: Oct 4, 2012
Inventor: Delbert G. Liu (Dickerson, MD)
Application Number: 13/427,531
International Classification: E04G 3/20 (20060101); F16M 13/02 (20060101);